Decision Workspace
card-est-array vs cardinality-estimator vs enum-iterator
Side-by-side comparison of Rust crates
55
card-est-array
growingv0.6.0
Infrastructure for managing large arrays of cardinality estimators.
63
cardinality-estimator
growingv1.0.3
A crate for estimating the cardinality of distinct elements in a stream or dataset.
62
enum-iterator
growingv2.3.0
Tools to iterate over all values of a type (e.g. all variants of an enumeration)
Core Metrics
| card-est-array | cardinality-estimator | enum-iterator | |
|---|---|---|---|
| Health Score | 55 | 63 | 62 |
| Total Downloads | 14.8K | 1.1M | 45.2M |
| 30d Downloads | 1.4K | 92.3K | 2.6M |
| Dependents | 15 | 49 | 4.4K |
| Releases | 8 | 4 | 26 |
| Last Updated | 66d ago | 104d ago | 259d ago |
| Age | 1y 1m | 2y | 7y 10m |
Health Breakdown
card-est-array
Maintenance
15
Quality
15
Community
8
Popularity
5
Documentation
12
cardinality-estimator
Maintenance
11
Quality
19
Community
13
Popularity
7
Documentation
13
enum-iterator
Maintenance
9
Quality
20
Community
12
Popularity
8
Documentation
13
Technical Details
| card-est-array | cardinality-estimator | enum-iterator | |
|---|---|---|---|
| Version | 0.6.0 | 1.0.3 | 2.3.0 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✓ Yes |
| License | Apache-2.0 OR LGPL-2.1-or-later | Apache-2.0 | 0BSD |
| Dependencies | 4 | 14 | 1 |
| Crate Size | 42KB | 434KB | 8KB |
| Features | 1 | 2 | 0 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | 2021 | 2021 |
| MSRV | 1.85 | — | — |
| Owners | 1 | 2 | 1 |
Links
Quick Verdict
- •cardinality-estimator leads with a health score of 63/100, but none of the options score above 80.
- •enum-iterator has the most downloads (45.2M), suggesting wider adoption.
- •enum-iterator is depended on by 4.4K crates — strongest ecosystem trust.
- •card-est-array is pre-1.0 — API may change.